Don't want your other half to read your texts? Then here's the gadget for you: a WWII Enigma machine – the Nazi's encryption device made famous in Richard Harris' book Enigma and the film of the same name, which sold in 2006.
Your partner in subterfuge will need one to decode your messages, so it's lucky another came on sale a year later, selling for €55k.
With a pair of these, your secrecy will be guaranteed - unless your partner is related to a Bletchley Park veteran with an valuable heirloom in their attic.
